@grishka in #software:smithereen has implemented true as:Group support. Thinking that whatever this extension should turn out to be it should be backward-compatible, or at least easily mapp-able, to group solutions currently out there in the wild.
Right now for Smithereen a decision has to be made how to represent the role of group members, where there can be Admins and Moderators. Quoting from this toot and subtoot:
Still not sure how to represent these group admins in #ActivityPub objects tho. PeerTube uses a similar construct for its channels and uses
attributedToto link a channel with its managing user. But I can have multiple admins per group, that’s the point
